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两组患者预充氧期间舒适度的比较
Comparison of comfort degree during preoxygenation between two groups
| Discomfort level | HF group (n=28) | M group (n=28) | Statistic | P |
| No discomfort | 6 (21.4) | 8 (28.6) | 0.381 | 0.537 |
| Mild discomfort | 18 (64.3) | 19 (67.9) | 0.080 | 0.778 |
| Moderate discomfort | 3 (10.7) | 1 (3.6) | 1.077 | 0.299 |
| Severe discomfort | 1 (3.6) | 0 (0) | 1.018 | 0.313 |
